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AAT2801IXN-5.0-T1

更新时间： 2024-02-02 13:02:49
品牌 Logo 应用领域
ANALOGICTECH 泵
页数 文件大小 规格书
20页 747K
描述
Multi-Mode Charge Pump for White LED Backlight and Flash Applications

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中文翻译

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AAT2801IXN-5.0-T1 技术参数

生命周期：Obsolete包装说明：,
Reach Compliance Code：unknown风险等级：5.84
Base Number Matches：1

AAT2801IXN-5.0-T1 数据手册

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AAT2801  
Multi-Mode Charge Pump for  
White LED Backlight and Flash Applications  
™
ChargePump  
General Description  
Features  
The AAT2801 is a member of AnalogicTech's Total  
Power Management IC™ (TPMIC™) product family.  
It has a dual charge pump architecture designed to  
support both the white LED backlight and flash appli-  
cations for systems operating with Lithium-Ion bat-  
teries. The backlight charge pump provides power  
required to drive up to four LEDs. To maximize  
power efficiency, it automatically selects 1X, 1.5X, or  
2X mode. The device produces current levels up to  
30mA on each of its four current source outputs.  
AnalogicTech's Simple Serial Control™ (S2Cwire™)  
interface is used to enable, disable, and set the LED  
drive current with a 32-level logarithmic scale LED  
brightness control.  
•
•
VIN Range: 2.7V to 5.5V  
Dual Charge Pump  
— Flash: Charge Pump Doubler  
— Backlight: Tri-Mode Charge Pump  
Drives Low-VF and High-VF LEDs  
Up to Four 30mA Outputs  
32-Position Logarithmic Scale with Digital  
Control  
Low Noise Constant Frequency Operation  
1MHz Switching Frequency  
AutoBias Technology  
Regulated 4.5/5.0 Volts VOUT_FLASH  
Up to 250mA of Current for Flash  
Automatic Soft Start  
No Inductors  
IQ <1µA in Shutdown  
•
•
•
•
•
•
•
•
•
•
•
•
The flash charge pump is a charge pump doubler  
with a regulated output voltage. It is designed to  
deliver 120mA of continuous current and up to  
250mA of pulsed current. It has an independent  
enable pin for improved power savings.  
Available in 16-pin TDFN44 Package  
Applications  
The AAT2801 is equipped with AnalogicTech’s  
AutoBias™ technology which allows individual LEDs  
to be powered either by charge pump or battery  
input, determined internally and automatically to  
maximize the power efficiency even with a large dif-  
ference in LED forward voltage.  
•
•
•
•
Display Modules  
Mobile Phones  
PDAs  
Smart Phones  
The AAT2801 has thermal protection and built-in  
soft-start circuitry. A high charge pump switching fre-  
quency enables the use of very small external capac-  
itors. The AAT2801 is available in the 16-pin  
TDFN44 package.  
Typical Application  
C1  
C2  
C3  
1μF  
1μF  
1μF  
C1+  
IN  
C1- C2+  
C2- C3+  
C3-  
OUT_FLSH  
Flash LED  
CF  
1μF  
CP  
RB  
V
IN  
CIN  
CCP  
AAT2801  
1μF  
1μF  
D1  
D2  
D3  
D4  
Backlight  
EN/SET  
EN/SET  
D4  
D3  
D2  
D1  
Flash Enable  
EN_FLSH  
GND  
2801.2006.04.1.3  
1
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